#app {
  background-color: #e493d0;
  background-image:
    radial-gradient(closest-side, rgba(235, 105, 78, 1), rgba(235, 105, 78, 0)),
    radial-gradient(closest-side, rgba(243, 11, 164, 1), rgba(243, 11, 164, 0)),
    radial-gradient(closest-side, rgba(254, 234, 131, 1), rgba(254, 234, 131, 0)),
    radial-gradient(closest-side, rgba(170, 142, 245, 1), rgba(170, 142, 245, 0)),
    radial-gradient(closest-side, rgba(248, 192, 147, 1), rgba(248, 192, 147, 0));
  background-size:
    130vmax 130vmax,
    80vmax 80vmax,
    90vmax 90vmax,
    110vmax 110vmax,
    90vmax 90vmax;
  background-position:
    -80vmax -80vmax,
    60vmax -30vmax,
    10vmax 10vmax,
    -30vmax -10vmax,
    50vmax 50vmax;
  background-repeat: no-repeat;
  animation: 10s movement linear infinite;
}

/* 背景模糊 */
#app::after {
  content: '';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: -10;
}

@keyframes movement {

  0%,
  100% {
    background-size:
      130vmax 130vmax,
      80vmax 80vmax,
      90vmax 90vmax,
      110vmax 110vmax,
      90vmax 90vmax;
    background-position:
      -80vmax -80vmax,
      60vmax -30vmax,
      10vmax 10vmax,
      -30vmax -10vmax,
      50vmax 50vmax;
  }

  25% {
    background-size:
      100vmax 100vmax,
      90vmax 90vmax,
      100vmax 100vmax,
      90vmax 90vmax,
      60vmax 60vmax;
    background-position:
      -60vmax -90vmax,
      50vmax -40vmax,
      0vmax -20vmax,
      -40vmax -20vmax,
      40vmax 60vmax;
  }

  50% {
    background-size:
      80vmax 80vmax,
      110vmax 110vmax,
      80vmax 80vmax,
      60vmax 60vmax,
      80vmax 80vmax;
    background-position:
      -50vmax -70vmax,
      40vmax -30vmax,
      10vmax 0vmax,
      20vmax 10vmax,
      30vmax 70vmax;
  }

  75% {
    background-size:
      90vmax 90vmax,
      90vmax 90vmax,
      100vmax 100vmax,
      90vmax 69vmax,
      70vmax 87vmax;
    background-position:
      -50vmax -40vmax,
      50vmax -30vmax,
      20vmax 0vmax,
      -10vmax 10vmax,
      40vmax 60vmax;
  }
}